Author Topic: Local Flat error correction (rejection)  (Read 559 times)

Offline ngc1535

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Local Flat error correction (rejection)
« on: 2016 December 14 22:55:18 »

After calibrating light frames I occasionally find that some flat errors remain in a particular night's data. A typical example is that flats are generated at the end of the night. At some point in the middle of the night a dust mote or other thing falls on an optical surface in front of the camera. Although the newly generated flats will correct images taken after the dust mote fell- they will not help for images at the beginning of the night.

So as part of the image integration and rejection process is there a method to locally select these areas in the problem images to have them be rejected pixels (in addition to normal statistical rejection)?